A082572 a(n) is the least number m such that the arithmetic mean of the distinct primes dividing m equals n.

2, 3, 15, 5, 35, 7, 39, 65, 51, 11, 95, 13, 115, 161, 87, 17, 155, 19, 111, 185, 123, 23, 215, 141, 235, 329, 159, 29, 371, 31, 183, 305, 427, 201, 335, 37, 219, 365, 511, 41, 395, 43, 415, 581, 267, 47, 623, 1501, 291, 485, 303, 53, 515, 321, 327, 545, 339, 59

Offset

2,1

Comments

Are there any terms with more than 3 prime factors?

Links

Paolo P. Lava, Table of n, a(n) for n = 2..1000

Example

a(6) = 35 because the prime factors of 35 are {5, 7}, which have mean 6.

Crossrefs

Cf. A070009, A078177, A200612.

Sequence in context: A262462 A180698 A266618 * A075244 A342567 A088030

Adjacent sequences: A082569 A082570 A082571 * A082573 A082574 A082575

Keyword

easy,nonn

Author

David Wasserman, May 06 2003

Status

approved